market-sizing

Calculate TAM, SAM, and SOM with bottom-up and top-down reconciled methods.

4|Updated Mar 21, 2026
One-click install
npx skills add https://github.com/alexhegit/sovereign-IQ --skill market-sizing-alexhegit
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: market-sizing
Source: https://github.com/alexhegit/sovereign-IQ/tree/main/workspace/skills/tam-sam-som
Command: npx skills add https://github.com/alexhegit/sovereign-IQ --skill market-sizing-alexhegit

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

It helps investors and operators quantify market opportunity (TAM, SAM, SOM) with evidence-backed math instead of vague estimates.

Core Features & Use Cases

  • Rigorous TAM calculation: Runs both bottom-up (preferred) and top-down cross-checks to bracket the true opportunity.
  • SAM filtering by product-fit: Applies model-based and geography-based filters (business model, ACV anchor, readiness, willingness-to-pay) with explicit reduction logic.
  • SOM penetration and validation: Converts SAM into Year 1 and Year 3 achievable revenue/customer targets using benchmark penetration rates and comparable-company signals.
  • Conflict reconciliation & sensitivity flags: Explains why bottom-up and top-down diverge (including the “new demand vs existing spend” case) and flags the three most sensitive assumptions to validate with primary research.
  • Use cases: Startup/investment memos, IC deck market opportunity sections, pricing/ACV anchoring, and competitive opportunity sizing across SaaS, AI tools, consumer brands, F&B, fashion/beauty, packaging, and automotive.

Quick Start

Use the market-sizing skill to produce both bottom-up and top-down TAM/SAM/SOM for "X", with your target geography, business model (B2B SaaS, B2C subscription, marketplace, or physical), and the pricing/revenue unit you want to anchor.

Frequently Asked Questions about market-sizing

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I calculate TAM, SAM, and SOM for an investor deck?

Calculate TAM, SAM, and SOM by running bottom-up and top-down reconciled methods to bracket the true market opportunity with evidence-backed math. This approach enforces explicit formulas, conservative low-high ranges, and source hierarchy to produce defensible market sizing.

What is the best way to filter SAM by product-fit and geography?

Filter SAM by applying model-based and geography-based filters using business model classification, ACV anchors, readiness, and willingness-to-pay logic. This explicit reduction logic ensures your serviceable available market accurately reflects actual product-fit constraints.

How do I validate SOM penetration rates for Year 1 and Year 3 targets?

Validate SOM penetration by converting SAM into Year 1 and Year 3 achievable revenue targets using benchmark penetration rates and comparable-company signals. This method grounds your serviceable obtainable market projections in real market data.

Why do bottom-up and top-down TAM calculations diverge?

Bottom-up and top-down TAM calculations diverge due to differing base assumptions, including the new demand vs existing spend case. The process reconciles these conflicts and flags the three sensitive assumptions to validate with primary research.

Can I use bottom-up market sizing for physical products and B2B SaaS?

Yes, bottom-up market sizing applies across B2B SaaS, B2C subscriptions, marketplaces, and physical products. You must specify your target geography, business model, and pricing revenue unit to set accurate ACV anchors for the calculation.